Blow-off valve for steam-boilers.



PATENTED SEPT. l1, 1906.

J. B. BARNES. BLOW-OEE VALVE FOR STEAM BOILERS.

APPLICATION FILED JAN. 8, 1906.'

IIIIIII .Steam-Boilers, of which the valve-box b, as shown,`or integral therewith,

- beinflush with l may reference being Fig. 1 and 5, a side elevation, to reduced is inserted, the opening 5 being' closed by a:

UNITEDT STATES PATENT OEEIOE.

JOSHUAB, BARNES, OF SPRINGFIELD, ILLINOIS. A'

BLow-oFF'vALvE Fon STEAM-BOILERS.

To all whom it may concern:

13e itknown that I, JOSHUA B. BARNES, a cltiaen of the United States, residing at Springfield, in the county of Sangamon and State of Illinois,- have invented a new and useful lmprovementin Blow-Ofi` Valves for following is a specification;

My invention relates to 1a blow-olf valve for a locomotive or other steam-boiler, and has forits ob'ect to obtain a rvalve that can be easily an instantly Opened and lclosed when under pressure, positive in action, and ada ted for use as a check or feed valve.

T e invention consists in features of novelty, as hereinafter described and claimed, had to the accompanying drawings, forming part of this specification, whereon- Figure 1 is a vertical longitudinal section 5 throughmy improved blow-off valve (seen, partly in elevation) and box therefor on line 1 1 in Fig. 2, showing. a preferable means of connecting the box to the shell (broken away) of a steam-boiler; Fig. 2, a top plan view of the valve-box; Fig'. 3, a front elevation thereof as seen from the left in Fig.,1; Fig, 4, a horizontal -section through the valve and box detached from the boiler on line 4 4 in scale, of the valve-box, showin ,a modified connection thereof with the boi er-shell.

Like letters and numerals of reference denote like parts in all the'ii es y a re resents a conical iJs-rk valve having a centra stem 1 on itsunder side and adapted to i'it the seat 2, which may be either of separate construction and removably fixed in the as referred.

rom the upper sidelof the valve a and radial to the center thereof, at a suitable diswhich unite with the pre of a cylindrical pocket 4, from, the central portion open at the top, the outer peripheral edges orsurfaces of the wings 3, which are preferably flush with' the edge of the valve a, being in circular alinement to each other, or in lieu of the edge ofthe valve a they e set back therefrom onits upper side. Through the top of the box b is a circular screw-threaded opening v5, through which the valve a, with its combined parts 1, 3, and 4,

erably circular wall i projecting upward of the valve a and Specification of Letters Patent. A I. Application filed January 8, 1903. Serial No. 295,102.

,thirnble 12 beyond the vhead`12 and, passing through at its lower or free end Patented sept. 11, e.-

correspondingly-threaded circular cover 6, r

havinga cylindrical recess 7 in its under side adapted to fit around and in" contact with the outer edges of the wings 3, which are free to slide ver-tically therein, and thereby form a guide to the valve a. Within the pocket 4 of the'valveit is placed a coiled sprin c, which bears at its lower end against the ottom of vlthe pocket 4 or upper side of the valve (L and at its upper end againstl the closed end of the recess 7 in the ycover 6, the said closed end' having,prefe rably,a depending teat 8, which enters and holds the' spring cin place thereat. The box b is forined on oneside above the valve-seat 2 with an inlet branch 9. havingf, preferably, a flange 10 at its outer end, in the face of which,around the opening of the pipe 9, is formed a circular recess 11'. Within the recess 1'1 is preferably fitted steam-ti ht the open end of a thimble or ca 12, whic regis ters With the opening of t e inlet branch 9 and is formed externally with a-spheri alshaped head orjbead 12', ada ted toeige steam-tight in a correspon ingly -shaped openingin the outei` shell 13 of a `stearnboiler, the straight tubular portion of the ,projecting with its closed end into the Water-spacelnot shown) behind` the shell 13. Through the cylindrical wall of the said tubular portion are holes or perforations;14, which ai'e arranged at suitable intervals entirely around and along the thimble 12, as shown, and revent the passage therethrough into'the va vebox 3 ofA any sediment orolid matter from the water in the boiler, the valve-box I; and

thimble 12 being firmly secured to each otherl 'and to the shell 13 of the bolts) 15, which are 'ta ped into the shell 13 oles in the flange 10, are tightened thereto by the nuts 15', or the studs 15 without throu hy the shell 13 in this case registering with tv e openin ofthe inlet branch 9, orthe outer end of' t boiler by studs. (orl .box b may .be fixed to the Shell 1-'3 by the the thimble 12', the opening IOO e inlet branch 9 may be threaded externally and screwed directly into y a correspondingly-threaded hole through the shell`13.4 The box bis formell, (preferably, op osite to the inlet branch 9 an adapted to lslide ortion through a. hole e stem 1 of theva ve a is orvg'uide 17,' formed t l below the; va veseat 2 with any outlet branch 1.6, to the `outer lexternallythreaded end of which is co'ilrgled apipe or hose as required.

tro'

rough the'bottom of 7 stem 1 at the o fpi l stem 1, fand there thereat, easily and instantly lifts or opens the v valve e from its seat 2 against the combined the box b, the free end of the stem 1 projecting beyond the guide 17 between two opposite side4 cheeks or brackets 18, which depend from the box b thereat. To the, brackets 18 and between the same, at ashort distance (determined by the-lift of the valve a) from the center of the stem 1, at one side thereof, is fulcrumed by a pin -19 o'ne end of an arm or le-` ver 20 of the second kind, which is adapted at the said distance from its fulcrum 19 to en- -gage or bear against the rojecting end of the stem 1, the outer free en' -of the lever 20 having a cord or chain 21 attached thereto within reach of the operator from any convenient part of the locomotive cabl orboiler-room, .as the case may be. Provision is also preferably made for enabling'the lever 20 to be removed from its fulcrum'19 at one'side of the f valve-stem .1 and similarly fulcrumed tothe brackets 18 at the `same distance fromv the osite side thereof, whereby the direction o e lever 20 and c'ord'21 can be changed as desired. v

ln operation by pulling fon the cord 2i* the lever 20 is forced against the end of the valvef y, owing to the leverage pressure in the boiler and the tension of the spring c above the valve QL into the 4position lindicated by dotted lines in lii'gs. 1 and 3, and in so doing the water and steam from the boiler passes -through the inlet branch 9 intol the valve-box b land through the opening of the valve a and outlet branch 416 to Waste, the sudden impact thereof in passing through the inlet branch 9 against the uidecheck-valve or for illin Wings 3 of the valve a causing a parta rotation of 1the latter at each operation', and thereby preventing uneven Wear of the valve-seat 2.' On releasing the cord 21 and lever 20 the valve a is instantly closed b vthe combined pressure from the boiler an the s ririg c. If desired, the valve a may be use asa the boiler with Water, in which case the ever 20 may be removed and a hose from a water-su lply'coupled to the outlet branch l16 of the iiox b.

In Fig.l 5 the flan e 10 and studs 15, with the' spherical-shape head 12 ofthe thimble 12, before described, are dispensed with and the thimble 22-screw-threaded -directly into the open end of the inlet branch 9 of the box bf and 1nto the shell of the boiler, respectively. WhatfI claim asV my invention, and desire.

--to secure by Letters Patent, isf

' the valve and havingi 1-. In -a valve of the class described, the combination of a box containin a seat for a remova le cover, a stem'on the under si at its free end through the Wall of the box, a4

pocket on the upper side of the valve, Win s on the valve uniting with the wall of the said pocket and slidable through the open end of a l Y e of the valve slidable n recess in the said cover for guiding the valve, a spring Within the pocket between the valve and the closed end` of the recess, an inlet to the box above the said seat, andan outlet from the box below the saidseat, the said inletregistering with an opening through the outer shell of and in communication with the water-space of a steam-boiler, means for fixing the box to the said shell and means for opening and closing the valve, substantially as described. Y

2. In a valve of the class described, the combination of abox containing a seat for the valve and having a removable cover, a stem on the under side of the valve slidable at its' free en d through the Wall of the box, a pocket on the upper side of the valve, wings on the valve uniting with the wall ofI the said pocket and slidable through the open end of a recess in the said cover for guiding the valve, a spring within the ocket between the valve and the closed en of the recess, an inlet to the. box above the said seat, and an outlet from the box below the said seat, thefsa'id'inlet having a flange and registeringwith the pen end of a thimble projecting steam-tight ilhrough theouter shell of, and into .the waterspace of a steam-boiler, and having perforations through its cylindrical wall within the said'space, means for fixing the box tothe said thimble and shell and means for opening and closing `the valve, 'substantially as described.

3. In a valve ofthe class described, the combination of a box containing a seat for the valve and having a removable cover, a stem on the under side of the valve slidable at its free end through the wall of the box, apocket on the upper side of the valve, win s on the valve yuniting with the Walls of sai `pocket and slidable through the open end of a recess in the' said cover for guidingvthe valve, a sprin within the ocket between the valve and t e closed encf) of the recess, an inlet tov the box above the said seat, fand an outlet from the box below the said seat, the said in let registerin with an opening through the outer shell o and in communication with thewater-space of a steam-boiler, a bracket projecting from the box adjacent to the said stem, a lever of the second kind fulcrumed to the .bracket at one side of the said stem and adapted to bear against the free end thereof,acord attached to the free end of the lever and means for fixing the box to the said shell, substantially as described.

In testimony whereof I have signed my name to this specification inthe presence of two subscribing witnesses.

' JOSHUAA BBARNES.

`Witnesses:-

, E. R. JEFFERY,

A. B. MARS.

IIt

Ilf 

